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Effect of nitrogen forms and levels on β-glucan accumulation in grains of oat (Avena sativa L.) plants

Fan, Mingshou, Zhang, Ziyi, Wang, Fengmei, Li, Zhen, Hu, Yuncai
Zeitschrift für Pflanzenernährung und Bodenkunde 2009 v.172 no.6 pp. 861-866
Avena sativa, blood, cholesterol, fertilizer rates, flowering, grain yield, nitrogen, nutrient management, oats, proteins, seed development
Oat consumption has been rapidly increased worldwide because its high β-glucan concentration may lower the level of blood cholesterol. The rates of β-glucan accumulation in two husk and two nude oats were determined with an interval of 5 d after anthesis in a pot experiment. The results showed that a higher nitrogen level increased oat grain yield per plant, thousand-grain weight, and concentrations of protein and β-glucan. β-glucan concentration generally increased with development of grain after anthesis, whereas the accumulation rate of β-glucan was greater at the early stage of grain development and reached a maximum around 25 d after anthesis. We also found a larger β-glucan concentration when plants were grown with NO$ _3^- $-N as compared to NH$ _4^+ $-N. This study may suggest that the agronomic approaches such as nutrient management by optimizing the time and the level of nitrogen application and a higher ratio of NO$ _3^- $-N to NH$ _4^+ $-N can play an important role in enhancing β-glucan concentration in oat grains.